The temperate zone between the Arctic Circle and the Tropic of Cancer.

(physics) An optical device that uses diffraction through alternate transparent and opaque rings to function as a lens

(geology) A deep-level seismic zone on the line of subduction. This zone can be as deep as 700km.

plural of Fresnel zone plate

(historical, from 1936 until 1956) The territory stretching around the course of the Suez Canal.

(history) The territory within Panama, stretching along the course of the Panama Canal but excluding the sea port cities Panama City and Colón under the 18 November 1903 lease treaty until the return of state control on 30 September 1979.

(botany) That part of a leaf and petiole that grows from an apical meristem.

(botany) That part of a leaf and petiole that grows from a basal meristem.

plural of zone-tailed hawk

(Buteo albonotatus), a medium-sized hawk of warm, dry parts of the Americas